When a major site recently experienced a fault on an 11kV transformer termination, the challenge was clear: restore the system quickly and safely without the expense/disruption of full PILC cable replacement.
Upon investigation, engineers discovered that a void had formed within the pitch insulation of the termination box: an all-too-common issue in legacy installations. Although the termination assembly had failed, the underlying PILC cable remained structurally sound and fully capable of continued service.
Instead of replacing the cable, the team opted for a smarter, more efficient approach: upgrade only the insulation system using the proven LoviSil liquid-silicone technology.
Thorne & Derrick are the UK’s specialist distributors for Lovink Enertech: LoviSil, PILC cable jointing solutions and MV termination systems; supporting utilities, DNOs, industrial sites and contractors with market-leading products.
Lovisil has been approved for use by NGED for more than 25 years and is also widely used by UKPN. It provides a dielectric strength greater than 21 kV/mm and remains fluid in service, allowing for natural movement without creating voids.
All degraded insulation compound was safely extracted from the termination box, exposing a clean cavity ready for refurbishment.
The housing was refilled using LoviSil, a premium liquid-silicone medium designed for high-integrity insulation in MV applications.
LoviSil delivers superior dielectric strength, helping reduce the likelihood of future failure.
The silicone compound flows into every internal space, eliminating air gaps that can lead to partial discharge (PD) and premature breakdown.
Because the system works seamlessly with the paper insulation of PILC cables, engineers avoided a costly and disruptive network decommissioning.
LoviSil maintains integrity under thermal and electrical stress, offering a modern, robust alternative to historical insulation materials.
This project highlights an increasingly important theme in today’s power networks: extending the life of legacy infrastructure using modern materials and smarter engineering choices.
By retaining the original PILC cable and upgrading only the termination insulation, the client achieved:
Significant cost savings
Reduced downtime and site disruption
Improved long-term network reliability
A future-proofed termination assembly
Lovink Enertech products are proven in service worldwide for network resilience, ease of installation, and long-term reliability.
Thorne & Derrick provide expert technical support, fast delivery and comprehensive stock availability for the complete Lovink range from medium voltage straight joints to high voltage transition solutions.
In the fast-growing solar sector, every connection matters. As panel installations scale and systems go to higher currents, installers need tools that combine precision, speed and robustness. At Thorne & Derrick, we’re excited to highlight the Klauke EK WF 120 ML, a powerful addition to our solar tool offering and how it complements the rest of our Klauke range.
When constructing solar parks, including transformer installation – secure, reliable connections are essential. With the battery-powered Klauke EK WF 120 ML Crimping Tool, installers can optimise workflows: faster, easier and with consistently high quality.
Thanks to its innovative square-comb mechanism, the EK WF 120 ML effortlessly crimps DIN-compliant, insulated, twin and insulated twin cable-end sleeves all without needing press inserts. The tool automatically adapts to the cable-end shape, ensuring even force distribution and a perfect crimp every time.
The result is clean, precise crimping across 6–120 mm². For cable end sleeves up to 32 mm in length, one single crimping operation is enough, allowing installers to complete most connections in just one step.
With the EK WF 120 ML, solar installers can rely on maximum efficiency and DIN 46228-compliant quality, helping keep solar park projects smooth, consistent and on schedule.
The EK WF 120 ML is a battery-powered hydraulic crimper perfect for larger solar DC conductors.
Key benefits for PV work:
Crimps 6–120 mm² with no die changes
Square-cam mechanism for consistent, reliable crimps
Lightweight + portable for rooftop and field installations
Battery powered hydraulic cutting tools 32 mm dia.
Battery powered hydraulic cutting tool 50 mm dia. for copper and aluminium cable
Battery powered hydraulic crimping tool, 6 – 300 mm²
Electromechanical crimping tool 0,14 – 50 mm²
Battery powered hydraulic crimping tool 10 – 240 mm²
Designed for clean, consistent DC terminations
Reduce installation time on connectors, strings and terminations
Improve long-term reliability of PV systems
Safer, repeatable crimping with minimal user effort
Thorne & Derrick International are UK based and are the leading specialist distributors of LV, MV and HV cable accessories and tooling from 600V to 132kV complemented by an extensive range of hazardous area certified electrical equipment (ATEX and IECEx) to provide compliant, safe and optimised power, heating and lighting. Thorne and Derrick International supports critical infrastructure projects across power, utilities, rail, construction, oil & gas, marine, and process industries. With over 40 years of industry expertise, Thorne & Derrick International delivers trusted products, technical support, and tailored solutions to meet the evolving needs of the energy and industrial process markets.
At Thorne & Derrick, we take great pride in developing future talent through our apprenticeship programme. This year, we are delighted to celebrate the success of our Class of 2025 – a group of bright, ambitious individuals who have completed their apprenticeships and are now embarking on the next stage of their professional journeys.
Our apprentices bring energy, innovation, and a fresh perspective to the business. Each has demonstrated resilience, adaptability and a commitment to excellence throughout their training. Together, they represent the future of our industry.
“During my time as a Business Administrator apprentice at Thorne and Derrick, I have developed a strong understanding of how the company operates and supports its customers. The apprenticeship has allowed me to broaden my knowledge of business practices while improving my digital skills, organisation, and professional communication. It has also helped me grow more confident in handling daily tasks, prioritising my workload, and contributing effectively to a busy team environment”
“During my time as an Apprentice Sales Engineer at Thorne and Derrick, I have developed a solid understanding of how our technical products and solutions support customer needs. The apprenticeship has enabled me to expand my knowledge of engineering and sales practices while improving my digital skills, organisation, and communication.
“During my time as a Business Administrator apprentice at Thorne and Derrick, I have developed a strong understanding of how the company operates and supports its customers. The apprenticeship has allowed me to broaden my knowledge of business practices while improving my digital skills, organisation, and professional communication. It has also helped me grow more confident in handling daily tasks, prioritising my workload, and contributing effectively to a busy team environment”
Through my Level 4 Sales Engineer Apprenticeship, I’ve gained hands-on experience in connecting technical solutions with customer challenges. The role has sharpened my problem-solving, communication, and technical understanding, while also teaching me how to manage enquiries confidently in a fast-paced sales setting.
Through my Content Creator Apprenticeship, I’ve gained hands-on experience in turning ideas and technical information into clear, engaging content. The role has strengthened my creativity, communication, and digital production skills, while also teaching me how to manage multiple projects confidently in a fast-paced environment. This experience has improved my organisation, technical understanding, and overall ability to support both the marketing team and wider business through impactful, well-crafted content.
The Class of 2025 represents the continued success of our apprenticeship scheme. As they take their next steps, we look forward to seeing their growth and contribution to the wider industry.
At Thorne & Derrick, investing in people is at the heart of what we do. Congratulations once again to Joe, Harvey, Chloe, Dylan, and Millie – the Class of 2025.
L to R: Benn Cowan (Admin Apprentice), Ella Bradley (Apprentice Sales Engineer), Elisa Thompson (Apprentice Sales Engineer), Noah Lowden (Apprentice Sales Engineer), Charlie Baines (Apprentice Sales Engineer) & Robert Wallace (Apprentice Sales Engineer)
We are also excited to welcome our new apprentices, the Class of 2026/27, as they begin their journey with us and continue the tradition of learning, development, and innovation at Thorne & Derrick.
Thorne & Derrick International are UK based and are the leading specialist distributors of LV, MV and HV cable accessories and tooling from 600V to 132kV complemented by an extensive range of hazardous area certified electrical equipment (ATEX and IECEx) to provide compliant, safe and optimised power, heating and lighting. Thorne and Derrick International supports critical infrastructure projects across power, utilities, rail, construction, oil & gas, marine, and process industries. With over 40 years of industry expertise, Thorne & Derrick International delivers trusted products, technical support, and tailored solutions to meet the evolving needs of the energy and industrial process markets.
In an industry where women in High Voltage Engineering careers is rare, Francesca Distefano is rewiring the possibilities for what it means to be a leader in this male-dominated workplace.
With several years major projects experience and proven competency for the installation of market-leading brands including Pfisterer Connex, Nexans Euromold and NkT, Fran is excelling in her field and hopefully inspiring more women to write their own future and likewise thrive in the electrical power industry.
Francesca’s work powers our world; employed on critical infrastructure projects from data centres to digitise our economy and offshore wind farms that power our planets renewable energy future towards the global goal of Net Zero 2050.
Her personal journey, fuelled by resilience and the support of allies, highlights both the challenges women still face in the industry and the immense opportunities ahead.
HV Jointer | 66kV GWO’s | Gold Card Electrician | SSTS | 18th Edition
Jointing LV HV Cables UK & International Projects | Onshore & Offshore
Q: Fran, you’ve carved out an impressive career in the traditionally male-dominated role of HV Jointer. What inspired you to pursue this path, and how did you overcome challenges as a woman in the industry?
Fran: My journey began with the support of my family, especially my Dad, who’s a carpenter. He encouraged me to break away from traditional norms and pursue what made me happy. When I started I faced scepticism—some wrongly assumed I couldn’t handle the job as Jointer simply because of my gender.
But I focused on proving my skills through hard work, dedication and investment in training. Being physically fit and confident in my abilities helped me earn respect. Surrounding myself with supportive colleagues, like mentors Steve and Paul, and my boyfriend Ian, who brought me into HV, made all the difference.
Q: What aspects of your work bring you the most satisfaction?
Fran: The tangible impact of my work is incredibly rewarding. Whether it’s helping power hospitals, schools or data centres, knowing I’m contributing to essential infrastructure is fulfilling. I take pride in delivering high-quality work, and when others admire the results, it’s a great feeling.
Q: You’ve highlighted the importance of mentorship. How did these relationships shape your career?
Fran: Mentors like Steve, Paul, and Ian were pivotal. They taught me the ropes, stood by me during tough times, and helped me grow into the professional I am today. Their belief in me gave me the confidence to push forward, even when I doubted myself.
Q: What are the biggest challenges women still face in the industry today?
Fran: The lack of facilities, like female changing rooms and toilets, is a glaring issue. Many sites aren’t designed with women in mind, which adds unnecessary stress. There’s also the constant feeling of being “watched” or underestimated. But I’m optimistic—more women joining the field will drive change and companies are starting to adapt.
Q: As an HV Jointer which tools are indispensable to your work?
Fran: The Ripley US15 and US02 are my go-to Jointing Tools – the professionally engineered tools make stripping outer sheaths and cable semi-cons effortless, ensuring clean, precise work. These cable preparation tools have revolutionised efficiency especially in highly critical projects including offshore wind power and renewable energy.
 |
 |
| US02 Bonded Semicon Shaving Tool | US15 Sheath Stripping Tool |
Q: What advice would you give to women considering a career in HV Cable Jointing?
Fran: Don’t let fear hold you back. Yes, it’s intimidating at first, but the opportunities are endless—from joining to management or testing. The industry needs skilled workers, and women bring unique perspectives. Stand your ground, prove your worth, and don’t let anyone deter you.
Q: How can we encourage more women to join this field?
Fran: Showcasing the job’s rewards—travel, financial stability, and the pride of creating something lasting—is key. Breaking stereotypes and highlighting trailblazers can inspire others. Companies should also improve on-site facilities and actively recruit women.
Q: Where do you see opportunities for women in HV engineering over the next decade?
Fran: With global projects booming, women can make their mark internationally. As pioneers, we can reshape perceptions and inspire the next generation. I’ve already seen positive changes, and I hope the trend continues—more inclusivity, better facilities, and a stronger female presence on sites.
Q: Any final words for aspiring women engineers?
Fran: Go for it 100%. This industry is tough but incredibly rewarding. Be the change you want to see, and remember—you belong here just as much as anyone else.
Thorne & Derrick are Specialist Distributors of LV HV Cable Installation, Jointing, Substation & Hazardous Area Electrical Equipment to international energy providers, EPC’s and HV Jointing Contractors working on the design, construction and maintenance of UK, European and international projects – T&D are servicing the utilities, wind, solar, battery storage, rail, oil/gas, hydrogen and the explosive atmosphere sectors.
T&D are Main UK Distributors of Medium Voltage Cable Joints, Terminations & Connectors from 3M Electrical, Lovink, Nexans Euromold, Pfisterer Connex and Sudkabel.
In the first half of 2025, we’ve had the privilege of supporting fifteen remarkable organisations across County Durham – groups that are transforming lives through sports, wellbeing programs, cultural enrichment, and essential community services.
These partnerships represent our shared commitment to:
• Strengthening neighbourhoods through improved facilities and gathering spaces
• Empowering young people with developmental opportunities
• Promoting wellbeing across all generations
• Celebrating local culture that binds communities together
We’re continually inspired by the dedication of these organisations and grateful for the opportunity to contribute to their meaningful work. Below, we highlight the initiatives we’ve supported – not as a measure of our giving, but as recognition of their invaluable community impact.
Project: Think With Your Feet – engaging young adults (19-25)
Approved: 23/01/2025
Project: New sightscreens for young cricketers (5-12 years)
Approved: 13/02/2025
Project: Facility improvements for all ages
Approved: 27/03/2025
Project: Wellbeing Summer Programme 2025 for teenagers (13-18)
Approved: 27/03/2025
Sports and youth clubs play a crucial role in keeping communities active and connected.
Project: Friday Night youth club for children (5-12)
Approved: 06/03/2025
Project: Educational programme for boys & young men (11-25)
Approved: 19/06/2025
Project: Wellbeing Tuesdays for all ages
Approved: 19/06/2025
Project: Step Into It – adult wellbeing programme (26-65)
Approved: 19/06/2025
Mental health and wellbeing are at the heart of strong communities.
Project: Security roller shutters for their workshop
Beneficiaries: Adults (26-65)
Approved: 13/02/2025
Project: The People’s Project for older people (66+)
Approved: 17/04/2025
Project: Growing Together – supporting adults (26-65)
Approved: 15/05/2025
Project: New outdoor canopy for children (5-12)
Approved: 19/06/2025
From skill-building to social support, these projects help people thrive at every stage of life.
Project: Supporting the Durham Fringe Festival
Beneficiaries: All ages
Approved: 11/06/2025
Arts and culture bring vibrancy to our communities, and we’re proud to back this exciting festival.
Thorne & Derrick International are UK based and are the leading specialist distributors of LV, MV and HV cable accessories and tooling from 600V to 132kV complemented by an extensive range of hazardous area certified electrical equipment (ATEX and IECEx) to provide compliant, safe and optimised power, heating and lighting. Thorne and Derrick International supports critical infrastructure projects across power, utilities, rail, construction, oil & gas, marine, and process industries. With over 40 years of industry expertise, Thorne & Derrick International delivers trusted products, technical support, and tailored solutions to meet the evolving needs of the energy and industrial process markets.
Published 21 Apr 2026
5 Common Cable Management Mistakes And How To Avoid Them Cable management is often overlooked but in industrial environments, it plays a critical role in safety, reliability and long-term performance. Loose, poorly routed or unprotected cables can quickly become...
Published 10 Apr 2026
Rethinking Cable Cleats for High-Density Data Centres Global demand for cloud computing, AI workloads and digital services is accelerating the construction of data centres at an unprecedented scale. Hyperscale facilities are now being developed across Europe, North America and...
